I suppose I should have included this in the previous entry, but, as I have been accused of being biased, here is how to resize a Microsoft Virtual Server virtual hard disk.

Microsoft Virtual Server does not come with any tools to allow you to do this so download VHDResize from here.

VHDResize (formally VHDExpand) will allow you to resize Microsoft's VS VHD files and will also convert between Fixed and Dynamic file types. This is a sector by sector copy operation from one size/type to the other and the source file remains unaltered.

 There. Balance restored.